tomfool

noun

1. a grossly foolish or stupid person; a silly fool.

adjective

2. being or characteristic of a tomfool.

noun

1. 1. a fool
   2. (as modifier)tomfool ideas

n.

“buffoon, clown,” 1640s, from Middle English Thom Foole, personification of a mentally deficient man (mid-14c.), see Tom + fool (n.).